A variable is a symbol that is used to hold a value or values in equations and inequalities. It is usually represented by a letter like x, y, or any letter which best represents the unknown value or values. Variables are used in writing algebraic expressions, together with constants, operators, and coefficients, to solve real-world or mathematical problems. Since variables represent unknown numerical values, we can perform operations on them just like we do with numbers. This means that the operations addition, subtraction, multiplication, and division apply to variables as well. Learn what a variable is by helping the two Junior Explorers, Jessica and Cello, earn the prestigious Blue Diamond Survival Patch on their camping trip in the New Mexico desert. Common Core Reference: CCSS.MATH.CONTENT.6.EE.B.6